Repeater



Patented May 12, 1931 PATENT LEE H. HOOK, PERCY EVANS, AND CHARLES S.WALLR-AIB, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOBS TO CALUMET STEELCOMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS REPEATER Application filed May 3, 1928. SerialNo. 274,800.

This invention relates to improvements in loop return repeaters forrolling mills and more particularly for repeaters for single sets ofthree-high rolls.

One object of our invention is to provide a simple and efficientrepeater which may be readily and easily applied to a set of threehighrolls and which when applied will automatically guide and return the barbeing rolled from one pass between the rolls to another, without anymanual lifting or manipulation of the bar as heretofore.

Another object of our invention is to provide a repeater which willpositively and accurately guide and direct the outcoming forward end ofthe bar from one pass to another without any opportunity aflorded forthe free forward end of the bar being displaced out of the repeater andrunning wild.

A further object of our invention is to so make the repeater that theloop formed in the bar may readily leave the repeater and extend outwardand backward to the extent necessary by the differential feed on the barwhere it is engaged by the rolls at the passes therein.

A further object of our invention is to make the arc of the repeater onsuch a radius that the tail end of the bar when it leaves the passbetween the rolls will follow easily around the repeater without beingdisplaced out of the same to have a whipping action and endanger theworkmen about the mill.

The invention consists further in the matters hereinafter described andclaimed.

In the accompanying drawings Fig. 1 is a vertical sectional view throughthe set of three-high rolls and showingthe re eater of our inventionapplied thereto.

ig. 2 is an end view-of the'repeater; and Fig. 3 is a top plan view ofthe same.

In the drawings, 1, 2, and 3 indicate the vertically arranged,horizontally disposed rolls of a three-high mill. The ends of the rollsare journaled and supported in upright standards 4 at the opposite endsof the rolls, as in mill design. The billet being rolled is introducedmanually back and forth into the first passes between the rolls untilthe last passes Where the repeater of our invention takes care of thereduced bar and automatically guides it from the next to the last passinto the last pass without any manual lift ing or manipulation, asheretofore.

The repeater has a receiving section 5 and a delivery section 6. Thereceiving section 5 is made in the "form of an upwardly opening troughhaving upright side walls 7, 8 and a bottom wall 9. The repeater isarran ed on the rear side of the rolls 1 to 3 with the entrance end ofthe repeater in line with the desired pass between the upper and theintermediate rolls 1, 2 so as to receive the bar therefrom. A plate 10secured to the entrance end of the trough 5 overlaps and is secured bybolts 11, 11 to a horizonal plate 12 which extends between and isattached by bolts 13 to the standards 4. In this manner, the entranceend of the trough 5 is supported in position opposite the desired passbetween the rolls. Guide blocks 15, 15 are secured to the plate 12between the rolls and the trough for guiding the free end of the bar asit leaves the rolls into the trough 5. At the entrance end of thetrough, its outer side wall 7 is flared outward, as at a, so as toinsure a guiding of the free end of the bar into the trough as the freeend of the bar leaves the guide blocks 15, 15. On the front side of therolls, are guide-blocks 16, 16 bolted to and supported by a plate 17also extending between and bolted to the standards 4, 4, as shown inFig. 1.

The trough 5 where it extends outward from the plate 12 is substantiallystraight and horizontal, so as to be in the general path of the outwardprojection of the bar from the rolls 1, 2. The straight portion of thetrough guides the free outer end of the bar into the loop return section18 of the trough at the outer end of the repeater. The radius orcurvature ct this section 18 is such that the free end of the bar willeasily follow around the curve and will not, under ordinarycircumstances, jump out of the trough and run wild. p

The loop section 18 inclines downward toward the rolls 2, 3 and theoutlet end I) of the section 18 is lower than the horizontaltroughsection 5. The outlet end 5 communicates with the delivery section6 of the repeater by having a telescopic connection therewith, as shownin Fig. 3. The section 6 is in the form of an elongated tubular spentand extends at an inclination downward toward the last pass betweetithintermediate roll and thelower roll 3. The outlet end of the section 6is supported at the elevation desired by bolts 19, 19 arranged above andbelow the spout and extending through holes 20 in the uprights 21, 21 ofa U-shaped bracket which is secured by a bolt- 22 to a cross-plate 23extending between and fastened to the standards 4. The holes 20 in theuprights 21 are verti cally arranged to permit vertical adjustment ofthe outlet end of the section 6. The bolt 22 may eXtfend through anelongated slot in the plate 23 to allow for lateral adjustment of theoutlet end ofthe spout 6 so that it may be properly aligned with anyoneof the desired passes betweeii the rolls 2, 3. This is also permittedby reason of the flexible connection between the spent- 6 and the trough5 at b.

The outlet; end of the spent 6 extends into the passage in the guidecasting 24 which is bolted to the plate 23 between the rolls 2, 3 andthe spout 6, as shown.

e free end oi the bar on entering the pass between the intermediate andlower rolls 2, 3 is gripped by said rolls, and the bar is furttr reduceddue to the shape of the pass, This reduction in the metal between therolls 2, will retard the feeder the bar at said rolls to less than thefeed on the bar at the rolls 1, 2. The result is that the difference inthe feed on the bar will cause the loop a in the bar to elongaterearwardly and leave the trough The trough being open allows this tohappen and permits the elongated loop to extend back beyond the rei''ateiover the upe1- edge of the outer side all 7 of the trough e theextent required for the loop to coinpensate for the diiierentia 7 feedon the bar at the respective pa s between ther'olls.

As soon as the rear or tail end of the bar leaves the gri f the rolls 12, the bar is then suhjected only to the feed of the rolls 2, 3, and theextendedloop in the bar will be rapidly taken up, This bring the barha'cl; into the trough, and the rear or tail end of the bar foll'oivsalongthe trough without any chance to whip out of the same. The innerside wall 8 of the trough around the loop section 18, as at (Z, isn'iadehigher than the froi'it wall 7 so that the extended loop in beingrapidly taken up can not be drawn inward out of the repeater to dodamage to the repeater or to the bar or to foiil in the mill.

The trough section 5 is housed at 25 from its outlet end 6 toapproximately the center of the curve of the loop section 18. Thehousing 28 has an. exceedingly wide iiiouth at the curve so that theextended loop a may form without interference. The enclosing walls ofthe housing 25 also act as a guard for the tail end of the bar as itleaves the curve and prevents said end iroin whipping out of the guideas it leaves the curve at 18. The wall 7 extends into the housing 25 soas to guide the forward or advancing end of the bar into the delive yspout 6. As shown in Fig.- 2, the wall 7 terminates short of the top ofthe housing 25, so that the loop may readily pass over the same bothwhen forming and when being taken up.

Vith the repeater extending rearward of the mill, the repeater liespractically outside of the mill and we provide a support- :tor it at itsouter or curved end. The form of support shown comprises a verticallydisposed 26 having at its lower end an adj rating screw 27 which bearsagainst the floor on the rear side of the mill for supporting the rearend of the repeater at the elevatioiid'esired.

The device of our invention is simple in construction and makes aneffective repeater for a single set of three-high rolls. It may bereadily and easily applied to the mill and guides the bar from a passbetween the upper and intermediate rolls of the mill to a pass betweenthe intermediate and lower 1"o11,s the same inill, thereby doing mechanically and automatically the work which has heretofore been manuallydone. The repeater saves considerable time because the forward end ofthe bar is directed back into the lower pass within a short time afterthe bar has been projected from the upper pass, instead of waiting untilthe entire bar has passed through the upper pass before it is introducedin the lower pass, as under a manual operation. The repeater also savesexpense because a workman is not required for the passes which therepeater serves. lVith the trough and delivery sections 5, 6 madeseparate, they may be cheaply made of castings, and moreover thedelivery part may have a flexible connection with the trough part forboth vertical and horizontal adjustments. 7

r We do not wish to be limited to the use of the repeater at anyparticular passes of rolls nor to the details of structure shown anddescribed, as these may be variously changed and. modified withoutdeparting from the spirit and scope of our invention.

We claim as our invention:

1. A rolling mill repeater, comprising a receiving portion with a loopreturn section,

and a delivery portion in communication with said loop return section,said receiving portion being in the form of an upwardly openingtroughhaving inner and outer side walls, said trough having a housing sectionwhere the trough enters the delivery portion, with the outer side wallof the trough extending into said housing and terminating short of thetea o'fthe same, 7

2. J: rolling mill repeater, comprisin a receivin portion with a loopreturn section, and a delivery portion in communication with said loopreturn section, said receiving portion being in the form of an upwardlyopening trough having inner and outer side walls, said trough having ahousing section where the trough enters the delivery portion, saidhousing having a flared open outer end and the outer side wall of thetrough extending into said housing approximately at the center of thesame.

3. In a rolling mill, in combination, a set of vertically disposedrolls, a pair of supports disposed at dili'erent vertical elevations onone side of the rolls in outward spaced relation thereto and arrangedwith one support for the pass between an upperroll andthe next rolltherebelow, and the other support for the pass between the lower rolland the next roll thereabove, a repeater device on the same side of therolls as the supports and arranged beyond the same, said repeater devicecomprising two parts anly, one part forming a receiving portion andhaving a loop return section with the entrance end ofthe receivingportion mounted on the upper support to receive the work from the rollsopposite such support, the other part of the repeater device forming thedelivery portion of the repeater and having a telescopic fit at one endwith the loop return section and mounted at the other end on the lowersupport to deliver the work to the rolls opposite the same, guide meansfor the work between the supports and the rolls opposite which they arerespectively arranged, and a support for the portion of the repeaterdevice beyond the mill.

4:. In a rolling mill, in combination, a set of three-high rolls, a pairof supports disposed at different vertical elevations on one side of therolls in outward spaced relation thereto and arranged with one supportfor the pass between the upper and the intermediate rolls and the othersupport for the pass between the intermediate and the lower rolls, arepeater device on the same side of the rolls as the supports andarranged beyond the same, said repeater device comprising two partsonly, one part forming a receiving portion and being in the form of anupwardly opening trough with a loop return section with the entrance endof the trough mounted on the upper support to receive the work from therolls opposite such support, the other part of the repeater deviceforming a delivery por tion therefor and being in the form of a tubularspout, having a telescopic fit at one end with the loop return sectionand the other end mounted on the lower support to deliver the work tothe rolls opposite the same, guide means for the work between thesupports and the rolls opposite which the supports are respectivelyarranged, and a support for the portion of the repeater device beyondthe mill. the receiving portion of the repeater device extendingsubstantially horizontally outward from the upper support, and the loopreturn section and the delivery spout being downwardly inclined towardthe lower support.

5. In a rolling mill, in combination, a set of three-high rolls, a pairof supports disposed at different vertical elevations on one side of therolls in outward spaced relation thereto and arranged with one supportfor the pass between the upper and the intermediate rolls and the othersupport for the pass between the intermediate and the lower rolls, arepeater device on the same side of the rolls as the supports andarranged beyond the same, said repeater device comprising two partsonly, one part forming a receiving portion, and having an integrallyconnected loop return section with the entrance end of the receivingportion mounted on the upper support to receive the work from the rollsopposite such support, the other part of the repeater device forming adelivery portion therefor and being in the form of a tubular spouthaving one end connected with the loop return section and the other endmounted on the lower support to deliver the work to the rolls oppositethe same, guide means for the work between the supports and the rollsopposite which the supports are respectively arranged, and a support forthe portion of the repeater device beyond the mill, the receivingportion of the repeater device extending substantially horizontallyoutward from the upper support and being open on its upper side so thatthe loop formed in the work when engaged by both rolls may extend out ofthe repeater, the loop return section being in the form of a housing,and the latter and the spout being downwardly inclined toward the lowersupport.

In testimony whereof we afiix our signatures.

LEE H. HOOK. PERCY EVANS. CHARLES S. WALLRAB.

